Improvement in tightening devices for woven-wire mattresses



N0, 142,940, Patented September16,1873.

7c T'VTH Winesses.

UNITED STATES PATENT CEEIGE.

DAVID J. POWERS, OE OHIOAGO, ILLINOIS.

IMPROVEMENT IN TIGHTENING DEVICES FOR WOVEN-WIRE MATTRESSES.

Specification forming part of Letters Patent No. 142,940, datedSeptember 16, 1873; application filed December 27, 1872.

To all whom it may concern:

Be it known that I, DAvID J. POWERS, of the city of Chicago, in thecounty of Cook and State of Illinois, have invented a certain new anduseful Improvement in Tension Devices for Woven-Wire Mattresses, ofwhich the following is a full description, reference being had to theaccompanying drawings making a part of this specification, in Which-Figure l is a plan vview ofthe frame, a portion of the same being cutaway; and Figs. 2 and 3, details, Fig. 3 being a section on line m ofFig. 2.

My present invention is an improvement on that for which I now have anapplication for A a patent pending; and its object is to provide abetter mode of tightening the woven Wire, theframe atthe same time beingso constructed that the frame can be readily taken apart, and themattress packed for transportation.

In the drawings, A B represent the side pieces of the frame, in one endof which is a long slot, b. O D are the cross-pieces, one at cach end ofthe frame, one of which, C, is secured to the frame by Screws, while theother, D, is held in place by means of two suitable bolts, c, one ateach end, passing through the slots b, and secured by a nut, g. a a arestrips, between which and the end pieces C D the Woven wire is to besecured by means of screws or otherwise. d d are tightening-bolts. Eachbolt has a head fitting in a recess in the edge of the cross-piece D, ascrew-thread upon one end, and a square portion, i, to Which a wrenchmay be applied to turn it. e e are nuts, permanently secured to the sidepieces A B, through which the bolts d pass. By loosening the nuts uponthe ends of the bolts c, and turnin gthetightening-bolts d, anyrequisiteamount of Strain may be given to the woven wire, and

when properly tightened the end piece D can be secured in position bymeans of the nut g.

This construction furnishes a very ready and efficient mode oftightening the Woven wire, the bolts c having a longitudinal movement inthe slots b, and, even if the nuts g are not made very tight, thetightening-bolts b prevent the cross-piece D from being drawn toward thepieces thinner on theinner than on the outer edges, or by notching themat their ends; or by notching the ends of the side pieces.

The mattress can be readily taken apart by removing the end pieces C D.The woven wire can be rolled up on one of these end pieces, and thewhole packed for transportation.

A substantial frame might be made by sccuring both of the end pieces tothe side pieces by means of bolts, dispensing with the slots b and thetightening-bolts d, in which case it would be necessary to tighten thefabric when it is secured to the frame.

What I claim as new is as follows:

The side pieces A B, provided with the slots b, and cross-piece D, incombination with the nuts e e and bolts d d, each provided with a headto fit in the recesses in the piece D, a screw-thread, andwrenchsurface, all constructed and arranged as'and for the purposespecified.

Witnesses: DAVID J. POWERS.

E. A. WEST, O. W. BOND.

